ELASTIC COMPOSITE YARN, METHODS FOR MAKING THE SAME, AND ARTICLES INCORPORATING THE SAME
First Claim
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1. An elastic composite yarn comprising:
- a composite core and a composite covering;
wherein the composite core comprises;
(a) an elastic core member having relaxed unit length L anda drafted length of (N×
L), wherein N is in the range of about 1.0 to about 8.0; and
(b) an inelastic functional core member having a fixed length of (N×
L); and
wherein the composite covering comprises;
(a) al least an elastic covering member; and
(b) at least one inelastic covering member surrounding the elastic covering member;
wherein the composite covering has a relaxed length that is greater than the drafted length (N×
L), of the elastic core member, such that substantially all of an elongating stress imposed on the composite yarn is carried by the elastic core member and the elastic covering member.
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Abstract
An elastic composite yarn comprises a composite core and a composite covering. The composite core comprises an elastic core member and an inelastic functional core member. The composite covering comprises at least an elastic covering member and at least one inelastic covering member surrounding the elastic covering member, such that substantially all of an elongating stress imposed on the composite yarn is carried by the elastic core member and the elastic covering member.
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Citations
18 Claims
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1. An elastic composite yarn comprising:
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a composite core and a composite covering; wherein the composite core comprises; (a) an elastic core member having relaxed unit length L and a drafted length of (N×
L), wherein N is in the range of about 1.0 to about 8.0; and(b) an inelastic functional core member having a fixed length of (N×
L); andwherein the composite covering comprises; (a) al least an elastic covering member; and (b) at least one inelastic covering member surrounding the elastic covering member; wherein the composite covering has a relaxed length that is greater than the drafted length (N×
L), of the elastic core member, such that substantially all of an elongating stress imposed on the composite yarn is carried by the elastic core member and the elastic covering member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15, 16, 17, 18)
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8. A method for forming an elastic composite yarn comprising:
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(1) providing a composite core and a composite covering; wherein the composite core comprises; (a) a first elastic member having relaxed unit length L and a drafted length of (N×
L), wherein N is in the range of about 1.0 to about 8.0; and(b) an inelastic functional member having a fixed length of N×
L;and wherein the composite covering comprises; (a) a second elastic member; (b) and at least one inelastic member; (2) drafting the first elastic member to a drafted length of (N×
L);(3) placing the inelastic functional member substantially parallel to and in contact with the drafted length of the first elastic member; and (4) wrapping, twisting, air jet covering, or core spinning in turns the composite covering about the drafted first elastic member and the inelastic functional member. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification